Let's not have another fatal error due to a simple oversight right before a release...

[lhc/web/wiklou.git] / RELEASE-NOTES

= MediaWiki release notes =

Security reminder: MediaWiki does not require PHP's register_globals
setting since version 1.2.0. If you have it on, turn it *off* if you can.

== MediaWiki 1.6.0 ==

MediaWiki is moving to a quarterly snapshot release cycle; roughly every
three months, the current 

Big things to note:
* MySQL 3.23.x is no longer supported.
* PHP 4.1/4.2 is no longer supported.
* Experimental Oracle support
* SVG support with rsvg
* Installer now use monobook skin
* New protection (bug 1735), preferences and userlogin designs
* Category system is always enabled.


== Upgrading ==

Several changes to the database have been made from 1.5; these are relatively
minor but do require that the update process be run before the new code will
work properly:

* A new "templatelinks" table tracks template inclusions.
* A new "externallinks" table tracks URL links; this can be used by a
  mass spam-cleanup tool in the SpamBlacklist extension.
* A new "jobs" table stores a queue of pages to update in the background; this
  is used to update links in including pages when templates are edited.

To ensure that these tables are filled with data, run refreshLinks.php after
the upgrade.


If you are upgrading from MediaWiki 1.4.x or earlier, some major database
changes are made.

See the file UPGRADE for more detailed upgrade instructions.


== Changes since 1.5 ==

* please fill in for the last couple weeks
* (bug 2885) More PHP 5.1 fixes: skin, search, log, undelete

Code quality:
* Use strval() to make sure we don't accidentally get null on bad revision
  text loads or other fields mucking up XML export output
* Clean up duplicate code for selection of changeslist style
* Correct blob caching to reduce redundant blob loads on backups
* (bug 3182) Clear link cache during import to prevent memory leak
* Fixed possible infinite loop in formatComment
* Wrap message page insertions in a transaction to speed up installation
* Avoid notice warning on edit with no User-Agent header
* (bug 3649) Remove obsolete, broken moveCustomMessages script
* Avoid numerous redundant latest-revision lookups in history
* Require PHP 4.3.2 or higher strictly now.
* Tweak infinite-template-handling loop for PHP 5.1.1 string handling change
* Remove unused OutputPage::addCookie()
* Fix for short_open_tag off again; please don't break this, guys
* (bug 4507) Adjust FULLPAGENAMEE escaping to standard form
* (bug 5302) Merge the two #p-search .pBody statements in monobook css.

Database:
* Finally dropped MySQL 3.23.x support
* Oracle support
* (bug 3056) MySQL 3 compatibility fix: USE INDEX instead of FORCE INDEX
* Update all stats fields on recount.sql
* (bug 3227) Fix SQL injection introduced in experimental code
* Fix table prefix usage in Block::enumBlocks
* (bug 3448) Set page_len on undelete
* (bug 3506) Avoid MySQL error when Listusers returns no results
* Skip update of disused 'rc_cur_time' field (todo: discard the field)
* (bug 3735) Fix to run under MySQL 5's strict mode
* (bug 3786) Experimental support for MySQL 4.1/5.0 utf8 charset mode
  NOTE: Enabling this may break existing wikis, and still doesn't
  work for all Unicode characters due to MySQL limitations.
* MySQL 5.0 strict mode fix for moving unwatched pages
* Ability to set the table name for external storage servers
* Update ipblocks table in MySQL 5 table defs
* Removed FulltextStoplist.php, no longer used (was for MySQL 3.x workaround)
* Added templatelinks table, to track template inclusions. User-visible effects
  will be:
  * (inclusion) tag for inclusions in Special:Whatlinkshere
  * More accurate list of used templates on the edit page
  * More reliable cache invalidation when templates outside the template
    namespace are changed
* Respect database prefix in dumpHTML.inc
* Removed read-only check from Database::query()
* Added externallinks table, to track links to arbitrary URLs
* Added job table, for deferred processing of jobs. The immediate application is 
  to complete the link table refresh operation when templates are changed.
* Don't change the password of the MySQL root user.

Documentation:
* (bug 3306) Document $wgLocalTZoffset

Hooks:
(list not complete)
* Move ArticleSave hook execution into Article insert/update functions,
  so they get called on non-EditPage actions that use these functions
  to create or update pages.
* Added EditFilter hook, and output callback on EditPage::showEditForm()
  for a place to add in captcha-type extensions in the edit flow
* (bug 3684) Fix typo in fatal error backtraces in Hooks.php
* Fix for hook callbacks on objects containing no fields
* Add a hook for additional user creation throttle / limiter extensions
* Use $wgOut->parse() in wfGetSiteNotice() instead of creating a new parser
  instance. This allows use of extension hooks if required.
* Added AutoAuthenticate hook for external User object suppliers
* Added 'PageRenderingHash' hook for changing the parser cache hash key
  from an extension that changes rendering based on nonstandard options.
* Add 'GetInternalURL' hook to match the GetFullURL and GetLocalURL ones
* (bug 4456) Add hook for marking article patrolled
* Add UserRights hook, fires after a user's group memberships are changed

Images:
* Support SVG rendering with rsvg
* Cap arbitrary SVG renders to given image size or $wgSVGMaxSize pixels wide
* (bug 3127) Render large SVGs at image page size correctly
* Fix scaling of non-integer SVG unit sizes
* (bug 2800) Don't scale up small images on |thumb| without explicit size
* Use the real file link instead of the default-size rasterized version for
  large SVG images on image description page
* Include the file name/type/size line for non-resized images
* (bug 3489) PHP 5.1 compat problem with captioned images
* (bug 3643) Fix image page display of large images with resizing disabled
* Added a limit to the size of image files which can be thumbnailed
* (bug 3806) Gracefully fall back to client-side scaling on |thumb| image
  that passes $wgMaxImageArea
* (bug 153) Adjust thumbnail size calculations to match consistently;
  patch by David Benbennick
* (bug 4162) Add $wgThumbnailEpoch timestamp to force old thumbs to
  be rerendered on demand, sitewide
* (bug 1850) Additional fixes so existing local and remote images
  get a blue link even if there's no local description page
* Avoid FATAL ERROR when creating thumbnail of non-existing image
* (bug 4207) Wrong image size when using 100x200px syntax to scale image up
  patch by David Benbennick
* Don't delete thumbnails when refreshing exif metadata. This caused thumbs
  to vanish mysteriously from time to time for files that didn't have metadata.
* (bug 4426) Add link to user_talk page on image pages
* Support a custom convert command for thumbnailing. See DefaultSettings.php
  and the comments for $wgCustomConvertCommand, for more information.
* UserCan hook now allows advisory return values, rather than mandatory ones.

Installer:
* (bug 3782) Throw fatal installation warning if mbstring.func_overload on.
  Why do people invent these crazy options that change language semantics?
* Fixed installer bugs 921 and 3914 (issues with using root and so forth)
* (bug 4258) Use ugly urls for ISAPI by default
  patch by Rob Church
* Improve installer 
        * Use a superuser account (such as root), if specifed, to create tables
        * Don't overwrite conservative permissions on the mySQL user with ALL
          permissions, if said user exists
        * Changes to some of the wording of explanations for fields
* (bug 1734) granting db permissions failed with db usernames containg '-'
* Add basic check for session support in PHP and die if not present

Maintenance:
* Fix problem reported on mailing list where re-initialising stats didn't work (can't insert
  duplicate rows with the same id field)
* Added --conf option to command line scripts, allowing the user to specify a 
  different LocalSettings.php.
* Maintenance script to delete unused text records
* Maintenance script to delete non-current revisions
* Maintenance script to wipe a page and all revisions from the database
* Maintenance script to reassign edits from one user to another
* Maintenance script to find and remove links to a given domain (cleanupSpam.php)
* Fix --report interval option for dumpTextPass

i18n / Languages:
* Partial support for Basque language (from wikipedia and meta)
* (bug 3141) Partial support for Breton language (thanks Fulup).
* Support for venitian language
* (bug 1334) LanguageGa.php update
* Finnish date format was hardcoded, now implemented properly
* (bug 3190) Added some date format choices for language sr
* (bug 2753) Some namespaces were not translated in LanguageTa.php (Tamil)
* (bug 3204) Fix typo breaking special pages in fy localization
* (bug 3177) Estonian date formats not implemented in LanguageEt.php
* (bug 1020) Changing user interface language does not work immediately
* (bug 3271) Updated LanguageNn.php for HEAD
* Experimental feature to allow translation of block expiry times
  Implementation only for Finnish currently
* (bug 3304) Language file for Croatian (LanguageHr.php)
* (bug 2143) Update Vietnamese interface
* (bug 3063) Remove some hardcodings from Hebrew localisation
* (bug 3408) Bulgarian formatNum corrected
* (bug 1512) Disable x-code interp on Esperanto URLs for now, it does more
  harm than good under current system by breaking incoming URLs with "ux".
  (Editing is not affected, just URLs.)
* (bug 1423) LanguageJa.php update
* Fix language name for dv
* (bug 3503) Update LanguageSq.php from sq.wikipedia.org messages
* (bug 3629) Fix date & time format for Frisian
* (bug 3334) Namespace changes for Polish
* (bug 3580) Change default Dutch language file to more neutral
* (bug 3656) LanguageHr.php - added convertPlural
* (bug 3414) LanguageBe.php - added convertPlural
* (bug 3163) Full translation of LanguageBr
* (bug 3617) Update for portuguese language (pt)
* Namespaces hacks on LanguagePl
* (bug 3682) LanguageSr.php - added convertPlural
* (bug 3694) LanguageTr.php update
* (bug 3711) Removed invisible unicode characters from LanguageHu
* (bug 2981) Linktrail for Tamil (ta)
* (bug 3722) Update of Arabic language (ar) Namespace changes
* Removed hardcoded Norwegian (no) project namespaces
* (bug 2324) image for redirects should be without text and oriented according to content language
* (bug 3666) Don't spew PHP warnings in prefs on unrecognized site language
* (bug 3817) Use localized date formats in preferences; 'no preference' option
  localizable as 'datedefault' message. Tweaked lots of languages files...
* (bug 2721) Regression: Use European number separators for vi: wikis
* (bug 3961) minor languageDe changes
* (bug 1984) LanguageKo.php (Korean) update
* (bug 3804) update of LanguageWa.php file
* (bug 3886) Update for Portuguese language (pt)
* (bug 4020) Update namespaces for ms
* (bug 3922) bidi embedding overrides on category links
* (bug 4061) Update of Slovene namespace names (LanguageSl.php)
* (bug 4064) LanguageDe comma changes
* (bug 3922) Further tweaks to bidi overrides in category list for old
  versions of Safari and Konqueror
* Fix custom namespaces on wikis set for Portuguese
* (bug 4153) Fix block length localizations in Greek
* (bug 3844) ab: av: ba: ce: & kv: now inherit from LanguageRu.php
             ii: & za: now inherit from LanguageZn_cn.php
* (bug 4165) Correct validation for user language selection (data taint)
* (bug 4192) Remove silly 'The Free Encyclopedia' default sitesubtitle
* Use content-lang for sitenotice
* (bug 4233) Update LanguageJa.php
* (bug 4279) Small correction to LanguageDa.php
* (bug 4108, 4336) Remove trailing whitespace from various messages, which
  mucks up message updating to create dupe entries
* (bug 4389) Fix math options on zh-hk and zh-tw (but not localized)
* (bug 4392) Update of LanguageSr.php
* (bug 4382) Frisian numeric format
* (bug 4424) Update for Spanish language (es) 100% messages translated
* (bug 4425) Typos in Polish translation
* (bug 4436) Update for Turkish language (tr)
* (bug 4413) Update of Farsi language file (LanguageFa.php)
* Update for LanguageSr (Serbian): magic words
* (bug 137) MediaWiki:Copyrightwarning hardcoding
* (bug 4457) Update for Portuguese language (pt)
* convertPlural breakage fixed a little
* (bug 4144) Support for Sudanese language (Basa Sunda)
* Big cleanup:
 - Removed obsolote, badly or untranslated messages
 - Removed references to wikipedia/wikimedia etc in messages
 - Other cleanup, like removing html and javascript and extension calls
 - Removed hardcoded namespaces: Tt, Ms, Ia, Ga, Fo, Bn, Csb, He, Nv, Oc, Tlh
 - Removed some useless backwards compatibility hacks
 - Fixed formatnum on many languages
* wgAmericanDates check produced incorrect results in languages that don't have
  a such distinction
* (bug 4548) Update for Portuguese language (pt): time format
* (bug 4530) Use consistent name for Kurdish
* Tweak default "upload disabled" text
* (bug 4504) Use site language for namespace name resolution
* (bug 4510) Correct Barnes & Noble bookstore URLs
* (bug 3991) Allow the operation of wikicode on Protect move only text
* (bug 4267) Switch dv sd ug ks arc languages to RTL
* Default main page content improved per bug 4690
* (bug 4615) Update for Portuguese language (pt)
* Separated MessagesSl.php as the other languages.
* (bug 4960) Add additional namespaces variants to Yiddish for compatibility
* (bug 4805) Removed more wikipedia-references from MessagesUk.php
* (bug 5015) Update magic words translation in LanguageBe.php
* (bug 4859) Update for Portuguese messages (pt)
* (bug 4788) One string for MessagesPl
* Restriction types now use restriction-* messages instead of ui messages
* (bug 4685) Slovenian LanguageSl.php hardcodes project namespace
* (bug 5097) Fix Hungarian language (hu): thousands separator
* (bug 5098) Update for Portuguese messages (pt)
* (bug 5113) Spelling error in French language file
* (bug 5105) Magic words for LanguageAr.php
* (bug 3993) Variants for Serbian language
* Typo in English messages file
* (bug 4114) Spacing in watchlist rows (in editing mode)
* Update default "exporttext" to reflect that Special:Import exists
* (bug 4960) Add additional namespaces variants to Yi projects: Yiddish Wikinews fix
* (bug 5357) Add the icon near the user name also in RTL interfaces
* (bug 5156) Update for Hebrew language (he)
* (bug 4497,4704,5010) Added some new language codes.
* (bug 5362) Piedmontese added
* (bug 5349) Update for Portuguese messages (pt)
* (bug 3573) Finished full Greek translation: namespaces
* (bug 5288) Initial localisation for Az
* (bug 4361) Fix "allmessagesnotsupportedui" so it doesn't refer to nonexisting
  page
* Tweak wording of "allmessagesnotsupporteddb"

Parser:
* (bug 2522) {{CURRENTDAY2}} now shows the current day number with two digits
* (bug 3210) Fix Media: links with remote image URL path
* (bug 3405) Don't use raw letters as aliases of MSGNW: and SUBST:
* (bug 3412) Clean up date format handling so ~~~~-sigs work with default
  format as designed. Documentation comments updated.
* Fix Parser::unstrip on PHP 5.1.0RC4
* (bug 3797) Don't expand variables and sigs in comments
* Allow parser cache on redirect targets
* Run wikitext-escaping on plaintext sigs (no wiki markup, just name)
* Check for unbalanced HTML tags on raw sigs (markup allowed, but show
  a warning in prefs and use default sig if not balanced)
* Respect <noinclude> and <includeonly> during {{subst:}} expansion as well as
  ordinary templates.
* Support <includeonly> in templates loaded through preload= parameter
* (bug 3979) Save correct {{REVISIONID}} into parser cache on edit
* Substitute {{REVISIONID}} correctly in diff display
* (bug 1850) Allow red-links on image pages linked with [[:image:foo]]
* Fix XML validity checks in parser tests on PHP 5.1
* (bug 4377) "[" is not valid in URLs
* (bug 4453) fix for __TOC__ dollar-number breakage
* Convert unnecessary URL escape codes in external links to their equivalent
  character before doing anything with them. This prevents certain kinds of
  spam filter evasion.
* (bug 4783) : Fix for "{{ns:0}} does not render"
* Improved support for interwiki transclusion
* (bug 1850) Image link to nonexistent file fixed.
* (bug 5167) Add {{SUBPAGENAME}} and {{SUBPAGENAMEE}} variables
* (bug 4949) Missing : in "addedwatchtext" for English and Spanish

Upload:
* (bug 2527) Always set destination filename when new file is selected
* (bug 3076) Support MacBinary-encoded uploads from IE/Mac
* (bug 2554) Tell users they are uploading too large file
* Support for a license selection box on Special:Upload, configurable from MediaWiki:Licenses
* Add 'reupload' and 'reupload-shared' permission keys to restrict new uploads
  overwriting existing files; default is the old behavior (allowed).

Security:
* (bug 3244) Fix remote image loading hack, JavaScript injection on MSIE
* (bug 3280) Respect 'move' group permission on page moves
* (bug 2613) Clear saved passwords from the form
* IP privacy fix for blocklist search on autoblocks
* Security fix for <math>
* Security fix for tables
* Security fix for Special:Upload license selection list
* Add UploadVerification hook for custom file upload validation/security checks
* Blacklist additional MSIE CSS safety tricks
* Fix meta robots tag on Special:Version again to avoid listing vulnerable
  versions for convenient harvesting by automated worms
* Sanitizer CSS comment processing order fix
* Forbid usernames that can be interpreted as titles with namespaces, as that
  leads to hard-to-manage names.
* (bug 4071) Generate passwords long enough for $wgMinimalPasswordLength
* Add createpage and createtalk permission keys, allowing a quick
  switch to disable page creation for anonymous users.
* (bug 675) Add page protection level for unregistered/new accounts
* User::isNewbie now uses the registration date and $wgAutoconfirmAge
* Add 'deletedhistory' permission key for ability to view deleted history
  list via Special:Undelete. Default is off, replicating the 1.5 behavior,
  but it can be turned back on for random users to replicate the previous
  1.6 dev behavior.
* Set cookies to secure mode based on use of HTTPS or $wgCookieSecure
* (bug 4371) Disallow tilde character in signatures
* Removed broken wgAllowAnonymousMinor and added new group right minoredit
* Added detection for WMF files (application/x-msmetafile), added this 
  MIME type to the default blacklist. Prevented inline display of images
  which are not of known image types. This is in response to
  http://en.wikipedia.org/wiki/Windows_Metafile_vulnerability
* Blocked users can no longer roll back, change the protection of, or delete/undelete pages
* Protect against spoofing of X-Forwarded-For header
* XSS issue : now sanitize search query input (fixed in 1.5rc3)
* Remove deprecated $wgOnlySysopsCanPatrol references; use User::isAllowed( 'patrol' )
  per bug 5282. Patch by Alan Harder.
* Prevent registration/login with the username "MediaWiki default"

Special Pages:
* Rearranged Special:Movepage form to reduce confusion between destination
  title and reason input boxes
* (bug 1956) Hide bot uploads from Special:Newimages
* (bug 3220) Fix escaping of block URLs in Recentchanges
* (bug 3284) Ipblocklist paging, substring search
* Allow filtering of robot edits in Special:Watchlist by stting 
  $wgFilterRobotsWL = true.
* Fix interlanguage links on special pages when extra namespaces configured
* (bug 3475) anon contrib links on Special:Newpages
* Special:Import/importDump fixes: report XML parse errors, accept <minor/>
* (bug 2369) Add separate message for input box on Special:Prefixindex
* (bug 3798) DoubleRedirects no longer has hard coded arrows
* (bug 3803) Fix links on Special:Wantedcategories with miser mode off
* Fix Special:BrokenRedirects on MySQL 5.0
* (bug 3807) Fix 'all' in namespaces drop-down on contribs, rc
* Fail gracefully on invalid namespace in Special:Newpages
* (bug 3762) Define missing Special:Import UI messages
* (bug 3761) Avoid deprecation warnings in Special:Import
* (bug 2894) Enhanced Recent Changes link fixes
* (bug 4059) fix 'hide minor edits' on Recentchangeslinked
* (bug 146) List number of category members in Special:Categories
  (patch by Joel Nothman)
* (bug 4090) Fix diff links in Special:Recentchangeslinked
* (bug 4093) '&bot=1' in Special:Contributions now propagate to other links
* Fix display of old recentchanges records for page moves
* (bug 360) Let Whatlinkshere track [[:image:foo]] links
* (bug 3073) Keep search parameter on paging in Special:Newimages
* Removed Special:Validate, it's been superseded by the Review extension
* (bug 4359) red [[user:#id]] links generated in [[special:Log]]
* (bug 1996) Special page to list redirects
* (bug 4334) Add "watch" links to Special:Unwatchedpages
* Generate target user page links in Special:Ipblocklist where appropriate
  (i.e. not an autoblock)
* Generate link to talk page of the blocker in Special:Ipblocklist, move
  contribs. link of the target next to their name
* (bug 2714) Backlink from special:whatlinkshere was hard set as 'existing'
* Move parentheses out of <a> link in Special:Contributions
* (bug 3192): properly check 'limit' parameter on Special:Contributions
* (bug 3187) watchlist text refer to unexistent "Stop watching" action
* Add block, block log and general log links to Special:Contributions
* Add contributions link to block log items
* Added optional "hide own edits" feature to Special:Recentchanges
* (bug 5018) Anchors for each message in Special:Allmessages
* Introduce $wgWantedPagesThreshold per bug 5011; Special:Wantedpages will not
  list pages with less than this number of links. Defaults to 1.
* (bug 4319) Don't show a "create account" link on the login form when
  account creation is disabled.
* JavaScript filter for Special:Allmessages
* (bug 3047) Don't mention talk pages on Special:Movepage when there isn't one
* Show links to user page, talk page and contributions page on Special:Newpages
* Special:Export can now export a list of all contributors to an article (off by default)
* (bug 5372) Add number of files to Special:Statistics
* (bug 2871) Links to talk pages in watchlist editing view
* (bug 5385) Allow hiding anonymous edits on Special:Recentchanges
* (bug 2544) Illogical error reporting order in Special:Userlogin

Misc.:
* PHP 4.1 compatibility fix: don't use new_link parameter to mysql_connect
  if running prior to 4.2.0 as it causes the call to fail
* (bug 3117) Fix display of upload size and type with tidy on
* (bug 2323) Remove "last" tabindex from history page
* (bug 3116) Division by zero on [[Image:Foo.png|123x123px|]]
* Fix display of read-only lockfile message
* Include software-visible client IP address in Special:Version comment
  as a proxy debugging aid
* (bug 3170) Page Title failed to obey MediaWiki:Pagetitle.
  wikititlesuffix was removed
* Add ability to break off certain debug topics into additional log files;
  use $wgDebugLogGroups to configure and wfDebugLog() to log.
* Edit conflict on recreation of deleted page
* (bug 3216) Don't show empty warning page when no warnings.
* (bug 3218) Use proper quoting on history Compare Revisions button
* Fix upgrade from 1.4 due to version number check breakage [for rc future]
* Fix upgrade from 1.4 with no old revisions
* Remove "info" editing toolbar that was shown in browsers which do not
fully support the editing toolbar, but was found to be too confusing.
* Don't override edit conflict suppression on section edits; section merging
  should provide the expected transparency here and fits usage patterns better.
* (bug 3292) Fix move-over-redirect test when current entries are not plaintext
* (bug 2078) Don't hide watch tab on preview
* Fix regressions in ChangesList traditional layout
* Fix edit on double-click for move-protected pages in Classic skin
* (bug 3485) Fix bogus warning about filename capitalization when off
* (bug 2570) Add 'watch this page' checkbox on uploads, watch uploads
  by default when 'watchdefault' option is on
* Add options to dumpBackup.php for making split/partial dumps by page id
* Added filter options, compression piping, and multiple output streams for
  dumpBackup.php
* (bug 3595) Warn and abort if importDump.php called in read-only mode.
* (bug 3598) Update message cache on message page deletion, patch by Tietew
* Added separate noarticletext and newarticletext messages for logged in and anon users.
* (bug 3332) Installation now uses Monobook, validates, plus usability improvements.
* (bug 3660) Update diff3 detection to work with Windows/Cygwin
* (bug 2330) Don't do funny thinks with "links" in MediaWiki:Undeletedtext
* Two-pass data dump for friendliness to the DB (--stub, then dumpTextPass.php)
* Data dump 'prefetch' mode to read normalized text from a prior dump
  (requires PHP 5, XMLReader extension)
* (bug 2773) Print style sheet no longer overrides RTL text direction
* (bug 2938) Update MediaWiki:Exporttext to be more general
* Various fixes
* Fix wfMsg*() replacements; args containing literal $[2-9] were wiped
* Added @import for [[MediaWiki:Common.css]] to all skins
* Edit box now remembers scrollbar position on preview
* (bug 3816) Throw edit conflict instead of fatal error when a page is
  moved or deleted during section edit
* (bug 3771) Handle internal functions in backtrace in wfAbruptExit()
* (bug 3291) 'last' diff link for last history line when not at end
* (bug 3667) Add missing global in page move code
* (bug 2885) Remove unnecessary reference parameter which broke classic skin
  talk notification on PHP 5.0.5
* (bug 3852) "Redirected from" link no longer obscured on double-redirects
* changed directory hierarchy in images/math/. System upgrades from old to
  new hierarchy on the fly.
* (bug 3487) Fix category edit preview with preview-on-bottom
* (bug 918) Search index incorrectly joined words at == headings ==
* (bug 3877) Render math images into temp directory, then move to hashed
  subdir so you can render new math images and have them work
* (bug 2392) Fix Atom items content type, upgrade to Atom 1.0
* Allow $wgFeedCacheTimeout of 0 to disable feed caching
* Fix WebRequest::getRequestURL() to strip off the host bits squid prepends
* Require POST for action=purge, to stop bots from purging the cache
* Added local message cache feature ($wgLocalMessageCache), to reduce bandwidth
  requirements to the memcached server.
* (bug 3562) for go search, try Caps-Variants-Broken-At-Non-Whitespace
* (bug 2569) Use PATH_SEPARATOR instead of trying to guess based on
  DIRECTORY_SEPARATOR (was wrong on NetWare)
* (bug 2740) Accept image deletions on 'enter' submit from MSIE
* (bug 3939) Don't try to load text for interwiki redirect target
* (bug 3948) Avoid notice warning in debug statement in bad search
* Recognize Special:Search consistently so read whitelist works
* (bug 3999) Change atom 1.0 feed id; had been unnecessarily complex due to
  unclear language in the spec. Now using the URL, same as the permalink,
  which someone else will probably whine about because it's not 'perma'
  enough or something.
* (bug 4014) Fix include mode for Allpages on small page sets
* (bug 3996) Fix text for new entries in RC RSS/Atom feed
* (bug 3065) Update both watched namespaces when renaming pages
* Changed mail form to have a bigger message entry box (like for editing
  a page
* Fix ulimit parameters for wfShellExec when memory_limit is specified in 'm'
* (bug 2111) Collapsable exif metadata table, clean up display
* Reduce fractions in display of exif exposure time
* (bug 4048) Optional footer link to site privacy policy
* Don't die() when update.php reaches the end of the warning count
* (bug 1915) Fix edit links when 'direction' used with 'oldid';
  using revision ID reported via OutputPage; Skin::editUrlOptions()
* Remove obsolete 'redirect=no' on some edit links
* Include oldid for the second revision on edit link on diff view
* (bug 4035) Fix prev/next revision links on edit page
* (bug 4100, 3049) Add 'edittools' message to hold edit tools, put it
  on Special:Upload as well as edit, rearrange edit page pieces a bit.
  Copyright warning now above the buttons to ensure it's visible,
  template list at the bottom so it can grow.
* Optional summary parameter to action=rollback, for user javascript
* (bug 4167) Fix regression caused by patch for bug 153
* (bug 4169) Use $wgLegalTitleChars in pipe trick conversions
* (bug 4170) Decode HTML character escapes in sort key
* (bug 4201) Fix user-talk mode for Enotif, and general code cleanup
* (bug 4214) Skip redundant action text inserts into the HTML <title>
* (bug 4212) Skip redundant meta-robots tag for default settings
* Fix regression: old version missing from edit links in Nostalgia skin
* (bug 1600) Trigger edit conflict on duplicate section=new submissions
* (bug 4001) Use local variables properly in wikibits.js akeytt()
* Fix regression: old version missing from edit links on CSS/JS pages
* (bug 3211) Include Date, To mail headers when using PEAR::Mail
* (bug 3407) Fix encoding of subject and from/to headers on notification
  mails; userMailer() now takes a MailAddress wrapper object instead of
  a raw string to abstract things a level.
* Fixed --server override on dumpTextPass.php
* Added plugin interface for dumpBackup, so additional filters and output
  sink types can be registered at runtime from an extension
* (bug 349) Fix for some numeric differences not being highlighted
  patch by Andrius Ramanauskas
* (bug 4298) Include rc_id on enhanced RC singleton diff links for patrolling
* Did some refactoring on ChangesList.php merging dupe code
* (bug 1586) Fix interwiki generator for wikimedia obscure domains
* (bug 3493) Mark edits patrolled when they are reverted
  patch by Leon Planken
* Removed experimental Amethyst skin from default set
* Upgrade old skin preferences properly at Special:Preferences
  (used to spontaneously switch to Classic skin for old numeric pref records)
* (bug 3424) Update page_touched for category members on category page creation
* Log views show message when no matches
* Fix raw sitenotice display on database error
* Fix autoconfirm check for old accounts
* (bug 4368) Don't show useless empty preview on new section creation
* Don't show useless empty preview on new page creation
* (bug 4411) Fix messages diff link for classic skin
* (bug 4385) Separate parser cache entries for non-editing users, so section
  edit links don't vanish / appear unwanted on protected pages
* (bug 2726, 3397) Fix [[Special:]] and [[:Image]] links in action=render
* (bug 4419) Remove obsolete magnify.png.old
* Removed $wgUseCategoryMagic option, categories are now enabled unconditionally
* (bug 3318) UI workarounds for disabled items in license selector
  MSIE/Win: items now grayed out, JS will revert to 'non selected' if clicked
  Safari: JS will revert to 'non selected' if clicked (but not gray)
  MSIE/Mac: indented items now visible (JS hack)
* (bug 714) "plainlinks" class issues in IE, Opera
* (bug 4317) Inconsistent "broken redirects" messages
* Default interface text for "selflinks" tweaked
* (bug 3194) default implementation of translateBlockExpiry
  which uses ipboptions
* (bug 4446) $wgExportAllowHistory option to explicitly disable history in
  Special:Export form, 'exportnohistory' message to translate live hack.
* Maintenance script to delete unused user accounts
* (bug 912) Search box easier to reach in text browsers (lynx, links)
* $wgParserCacheExpireTime added
* Skip loading of RecentChange.php except where needed
* Enforce $wgSVGMaxSize when rendering, even for SVGs with a very large source 
  size. This is necessary to limit server memory usage.
* Cleanup and error checking on Special:Listredirects
* Clear up some instances of old OutputPage::sysopRequired() function usage
* Improve "upload disabled" notice
* Move parts of index.php to include/Wiki.php in an attempt to both cleanup index.php 
  and create a MediaWiki-class mediaWiki base object
* (bug 4104) Added OutputPageBeforeHTML hook for tweaking primary wiki output
  HTML on final output (cached or not)
* Avoid PHP notice on command-line scripts if empty argument is passed ('')
* (bug 4571) Partial fix hack for {{fulllurl:}} in action=render
* (bug 3502) Bowtie symbol for TeX
* (bug 4000) Support for \textstyle et al. in <math>
* (bug 1663) support color in TeX formulas
* (bug 2026) missing glue around \not= (TeX)
* (bug 4576) Missing '>' broke license selector's first option in IE, Opera
* Override $wgLocaltimezone in parser tests for us outside Iceland and UK
* Fix extra whitespace at end of Wiki.php, DESTROYS XML OUTPUT
* Remove redundant 'echo' statements from MonoBook.php
* (bug 1103) Fix up redirect handling for images, categories
  Redirects are now followed from the top-level, outside of the Article
  content loading and viewing, for clarity and consistency.
* (bug 4104) 'OutputPageBeforeHTML' hook to postprocess article HTML on
  page view (comes after parser cache, if used). Patch by ThomasV.
* Linker::formatComment corrupted the passed title object on PHP 5
  if the comment included a section link. Use clone() to make a safe copy.
* Add wfClone() wrapper since we're still using PHP 4 on some servers.
* Remove obsolete killthread.php
* Added wfDie() wrapper, and some manual die(-1), to force the return code
  to the shell to return nonzero when we crap out with an error.
* Allow input of the stub from a compressed file instead of stdin
  for dumpTextPass.php; easier to get errors back on the shell
* Added an attractive space on the namespace selector on contribs
* Move PHP 5-friendly XHTML doctype hack to Sanitizer, use for sig checks.
  Fixes use of named entities in sigs on PHP 5
* (bug 4482) Include move comment on the null edit as well as the redirect
* (bug 3990) Use existing session name if session.auto_start is on
  Fixes checks for open sessions, such as the cookie warning on login.
  Patch by Zbigniew Braniecki.
* Add cache-safe alternate sitenotice for anonymous users. (MediaWiki:Anonnotice)
  This is displayed instead of the regular sitenotice, if it exists. If not, the
  regular sitenotice shows. If that doesn't exist, the value of $wgSiteNotice is used,
  and if that's null, then nothing is shown.
* Spit the generated LocalSettings code out during the installer as an aid
  to debugging issues. (Keep this?)
* Use __FILE__ to form path in new LocalSettings.php, so it stays accurate
  when the directory is relocated for typical usage.
* Auto-update $wgCacheEpoch when LocalSettings.php changes on new installs.
  For typical usage this will be a light burden and should reduce confusion
  when the configuration is edited.
* Fix $wgCacheEpoch's effect on client-side caching.
* (bug 1122) gray out 'older revision' when viewing first article revision.
* Clearer message in DefaultSettings.php: edit LocalSettings.php instead
* MonoBook skin top link id changed from "contentTop" to "top" (shared with
  name attribute)
* (bug 3350) Missing label for move talk page checkbox.
* (bug 2108) Sort entries when using category browser
* (bug 2393) Fix MIME type for Atom feeds ( application/rss+atom )
* Add ".deps.php" include-file preloaders for some dynamically-loaded
  language and skin classes. Should help with the broken base-class
  problem under PHP 5 with APC as opcode cache. See details:
  http://mail.wikipedia.org/pipermail/wikitech-l/2006-January/033660.html
* Small changes to tabs in Monobook skin c/o Chris Ware
* (bug 4679) Work around buggy basename() function in PHP5, which breaks
  uploads of files starting with multibyte characters on Linux.
  wfBaseName() doesn't suffer this bug, and understands backslash on
  both Unix and Windows.
* (bug 3603) headscripts variable not hooked up to MonoBook skin
* Allow local cdb-based interwiki cache
* Use the "block", not the "protect" permission, when determining whether to
  show a "block user" link in the toolbox
* Fix backup dump text prefetch for XMLReader constant changes in PHP 5.1
* Suppress useless percentage indicator on output from 7za during dumps
* (bug 4633) Add (previous 200) (next 200) also above catlinks
* (bug 4686) Fix regression where ?diff=0&oldid=0 caused fatal error on
  pages with only one revision. Fixes message diff link on first edit.
* Fix dependence on hardcoded UNIQ_PREFIX in LanguageConverter.php
* Do not check lag on external storage servers
* Do not tidy interface messages (unless full tidy is set)
* Do not trust equality propagation and give more hints to MySQL
  optimizer for revision fetches (avoids index scans)
* Use revision rate for ETA in dump generation; it tends to be more stable
  than the per-page count for full-history dumps.
* Include timestamp in wfDebugLog breakouts
* (bug 4469) Namespace-specific notice to be displayed below site-notice
  Edit messages like "MediaWiki:Namespacenotice-" plus namespace name
  which is blank for main namespace, or like e.g. "User_talk"
* Adjust user login/creation form hooks to work with a captcha plugin
* (bug 1284) Inline styles for diffs in Recent Changes RSS/Atom feeds
* (bug 4824) IE7 beta 2 broke compatibility with PNG logo workarounds,
  and seems to work ok with other bits. No longer including the IE
  workarounds JavaScript for IE 7 and above.
* Fix extra namespace for Bulgarian
* (bug 4303) Add $wgFavicon to change the shorticon icon link from
  the default /favicon.ico or disable it (if set to false)
* (bug 3347) strip linebreaks in math error source
* (bug 4841) Warning for non-logged-in edits
* (bug 4867) Leave invalid EXIF date fields unformatted instead of
  showing a bogus current timestamp
* Reset $wgActionPaths during parser test; corrects some false failures
  in the automated test report.
* (bug 4875) Define a div containing the shared image description
* (bug 4860) Expose Title->userCan() as Hooks
* (bug 4828) Fix genitive month-name variable for cs, pl, uk
* (bug 4842) Fix 'show number of watching users' with enhanced RC
* (bug 4889) Fix image talk namespace for Tamil
* (bug 4147) Added cleanupWatchlist.php to clear out bogus watchlist entries
* (partial bug 3456) Disable auto redirect to Main Page after account creation
* (bug 4824) Separate out IE7 CSS compat hacks, fix for RTL pages
* Added support for wikidiff2 and similar external diff engines.
* Allow cookies to be shared between multiple wikis with a shared user database
* Blocking some Unicode whitespace characters in usernames. Should check
  if some or all should be blocked from all page titles.
* Unknown log types no longer throw notices everywhere in RecentChanges
* (bug 4502, 5017) Don't render potentially hostile deleted page contents
  on Special:Undelete by default; show source, with an optional preview.
  The revisions list no longer shows the latest text by default, so it can
  still be operated if the text is hostile.
* (bug 5013) Check for existence on "return to" links
* Removed trailing whitespace on a bunch more messages.
* Fix missing bad title check in Special:Booksources
* Remove empty booksources string in fy
* Avoid corrupting <gallery> inside <!-- comment -->
* Remove legacy PHPTal code, hasn't been maintained in ages.
* Tweak Userlogin include order for APC issue
* Don't try to link to current page on protection tab
* More exact checking in Title::equals() to fox moves of numerically similar
  page titles. (Odd hex title bug on 64-bit.)
* Fix explicit s-maxage=0 on raw pages; should help with proxy issues in
  generated stylesheets... hopefully...
* (bug 4685) More fixes for Slovenian project namespace
* Fixed and enhanced a little the Live Preview, which had been broken for some time
* Added article size limit, $wgMaxArticleSize
* (bug 4974) Don't follow redirected talk page on "new messages" link
* (bug 4970) Make category paging limits configurable
* (bug 4535) Warn user when editing CSS or JS subpage of a skin that doesn't exist
* Make Live Preview an user preference, still controllable by the global variable
* Rename the stub LanguageAls / LanguageGem_alsation to LanguageGsw to follow
  updated language code assignments
* (bug 5081) Remove bogus fix for invalid characters in links which simply
  broke use of legitimate multiple whitespace characters in bracketed link.
* (bug 4838) Add relative oldids (prev, next, cur) for raw pages
  Patch by Lupin
* (bug 5086) Force image resize dimensions on ImageMagick, as for instance
  "-resize 100x35!"; some thumbs were off due to differences in rounding and
  would be generated smaller than expected.
* (bug 5062) Width sometimes one pixel short when using maximum heights
* Purge thumbnails and metadata cache for action=purge on an image page
* (bug 4273) Bounce back with a message when attempting to submit a new comment 
  with an empty main textbox (user probably hit Enter in subject field)
* (bug 5141) Gracefully handle the new account link when createaccount off
* (bug 5150 and related) Fix missing ID attribute in HTML namespace selector
* (bug 5152) Proper HTML escaping on subpage breadcrumbs
* (bug 4855) Section edit links now have the section name in the title attribute.
* (bug 2115) Support shift-selecting multiple checkboxes with JavaScript.
* (bug 5161) Don't try to load template list for nonexistent pages
* (bug 5228) Workaround for broken LanguageConverter title overrides; avoid
  unnecessary hidden UI work when watch/unwatch is performed on edit
* Fixed bogus master fallback in external storage
* (bug 5246) Add speak:none to "hiddenStructure" class in main.css
* Further work on rev_deleted; changed to a bitfield with several data-hiding
  options. Not yet ready for production use; Special:Revisiondelete is
  incomplete, and the flags are not preserved across page deletion/undeletion.
  To try it; add the 'deleterevision' permission to a privileged group.
* (bug 5270) Fix broken linktrail for br, cv, fr, hr, nn, oc, ta, wa
* Add a clickable contribs link in user tool links (rc, watchlist, diff view)
  to see how people like it. (There was one in the old hacked-up diff view.)
* (bug 5236) Load wikibits.js before site-customized javascript
* (bug 4119) Workaround for <nowiki> following link in Walloon; remove capitals
  from linktrail, as they're not used anywhere else.
* (bug 4781) Output links with the percent-encoding they're supplied with;
  save the normalization for internal link storage. The normalization is a bit
  buggy and can make incorrect foldings in the query string and such, so isn't
  reliable beyond the hostname where it's used for the spam bulk checker.
* Don't URL-decode in the title attribute for URL links; it can produce false
  results that don't code back to their original values.
* (bug 4611) Add user preference (default on) to add new pages to creators's watchlist
* (bug 5286) Fix regression in display of missing/bad revision IDs
* (bug 4729) Add user preference that marks a user's edits as patrolled if user is able to
* (bug 4630) Add user preference to prompt users when entering blank edit summaries
* Added optional suggest feature for the search box. Set wgUseAjax to true to
  enable it.
* (bug 5277) Use audio/midi rather that audio/mid
* (bug 5410) Use namespace name when a custom namespace's nstab-NS message is nonexistent
* (bug 5432) Fix inconsistencies in cookie names when using table prefixes
* Additional protections against HTML breakage in table parsing
* (bug 5355) Include skin name and style JS settings in page source;
  fixes regression where Opera 6/7 and KHTML CSS fixes weren't applied
  when wikibits.js was moved up before user JS inclusion.
* Added $wgColorErrors: if set, database error messages will be highlighted
  when running command-line scripts in a Unix terminal.
* (bug 5195) rebuildrecentchanges.php works again; Database::insertSelect now
  has a parameter for select options.
* Fix updateSearchIndex.php for new schema


=== Caveats ===

Some output, particularly involving user-supplied inline HTML, may not
produce 100% valid or well-formed XHTML output. Testers are welcome to
set $wgMimeType = "application/xhtml+xml"; to test for remaining problem
cases, but this is not recommended on live sites. (This must be set for
MathML to display properly in Mozilla.)


For notes on 1.5.x and older releases, see HISTORY.


=== Online documentation ===

Documentation for both end-users and site administrators is currently being
built up on Meta-Wikipedia, and is covered under the GNU Free Documentation
License:

  http://meta.wikipedia.org/wiki/Help:Contents


=== Mailing list ===

A MediaWiki-l mailing list has been set up distinct from the Wikipedia
wikitech-l list:

  http://mail.wikipedia.org/mailman/listinfo/mediawiki-l

A low-traffic announcements-only list is also available:
  http://mail.wikipedia.org/mailman/listinfo/mediawiki-announce

It's highly recommended that you sign up for one of these lists if you're
going to run a public MediaWiki, so you can be notified of security fixes.


=== IRC help ===

There's usually someone online in #mediawiki on irc.freenode.net